Whistle post
01
警笛標, 笛の標識
a sign along a railway track that tells the train driver to blow the whistle
例
The train driver saw the whistle post and blew the whistle to warn people near the tracks.
電車の運転士は警笛標を見て、線路近くの人々に警告するために警笛を鳴らしました。



























